When 13-year-old Allie Thompson and her best friend Sam happen upon a weather-making machine discarded by none other than Santa Claus, they use it to cause a snow day in Los Angeles. But when the machine gets out of hand, it threatens to ruin Christmas.
| Actor | Role |
|---|---|
 Hallee HirshAllie Thompson | Allie Thompson |
 Spencer BreslinJoey Thompson | Joey Thompson |
 Hallie ToddMichelle Thompson | Michelle Thompson |
 Brenda SongSamantha Kwan | Samantha Kwan |
 John SalleyCrumpet the Elf | Crumpet the Elf |
 Susan RuttanMrs. Claus | Mrs. Claus |
 John B. LoweSanta Claus | Santa Claus |
 Greg KeanSteve Thompson | Steve Thompson |
 Jason SchombingMr. Martino | Mr. Martino |
 Bill FagerbakkeSparky the Elf | Sparky the Elf |
 Peter ScolariEdwin Hadley | Edwin Hadley |
 Zahf ParooRuben (as Zahf Hajee) | Ruben (as Zahf Hajee) |
| LLaara OngLinda Kwan | Linda Kwan |
| CColin O'NeillBlake | Blake |
| TTiffany DesrosiersTina | Tina |
 Brittany MoldowanMary Jo | Mary Jo |
| JJo-Ann FernandesMrs. Lopez | Mrs. Lopez |
 Angela MooreMary Jo's Mother | Mary Jo's Mother |
 Daniel BoileauHorace (snowmobile driver) | Horace (snowmobile driver) |
| DDave McGowanStudent | Student |
 Karen HolnessNational Weather Person | National Weather Person |
| DDale ReynoldsNews Broadcaster Weather Person | News Broadcaster Weather Person |
| DDonna LysellNews Broadcaster | News Broadcaster |
| SShylo SharityJennifer | Jennifer |